91909110201 has 16 divisors (see below), whose sum is σ = 125314884864. Its totient is φ = 59891414144.

The previous prime is 91909110197. The next prime is 91909110221. The reversal of 91909110201 is 10201190919.

It is a cyclic number.

It is not a de Polignac number, because 91909110201 - 2² = 91909110197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91909110221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312636 + ... + 530621.

It is an arithmetic number, because the mean of its divisors is an integer number (7832180304).

Almost surely, 2^91909110201 is an apocalyptic number.

It is an amenable number.

91909110201 is a deficient number, since it is larger than the sum of its proper divisors (33405774663).

91909110201 is a wasteful number, since it uses less digits than its factorization.

91909110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844080.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 91909110201 in words is "ninety-one billion, nine hundred nine million, one hundred ten thousand, two hundred one".